Single-photon distance measurement system and method based on pulse string technology

The invention discloses a single-photon distance measurement system based on a pulse string technology. The single-photon distance measurement system comprises a transmitting convex lens, a transmitting concave lens, a sampling photosensitive tube, a laser, an LD driving source, a Q-switched driving source, a control processing board, a single-photon detector, a narrow-band optical filter and a receiving convex lens. The invention further discloses a single-photon distance measurement method based on the pulse string technology. A high-energy/low-energy double-laser pulse string structure is adopted, the distance of a distance measuring blind area can be reduced, the damage risk of a short-distance distance measuring detector is reduced, and meanwhile the long-distance target distance measuring requirement is met. The problem that single photon detection is difficult to realize single emission ranging due to the influence of background noise and dark noise is solved, and the noise control requirement of a las